Research status and progress of bonding heterogeneous materials based on surface texture

The application of surface texture technology in the connection of heterogeneous materials is of great significance to improve performance of welded joints. This paper aims to review basic concept and application status of main technologies of surface textured manipulation of heterogeneous materials bonding, and discuss their effects on mechanical properties, wetting and spreading ability and residual stress distribution of welded joints, as well as future research directions. In the field of adhesive bonding, surface texturization enhances wettability, permeability, adhesion and free energy of adhesive by increasing contact area and roughness, thus improving the mechanical properties of welded joints. Surface treatment techniques such as laser treatment, sandblasting and chemical corrosion have been shown to significantly improve tensile strength, corrosion resistance and wear resistance of adhesive bonded joints. In the process of laser welding, surface texturization not only enhances actual contact area between materials, but also changes distribution of intermetallic compounds, which greatly improves mechanical connection and mechanical properties of welded joints. In addition, control of residual stress distribution by surface microtexturing is helpful to prevent crack propagation and enhance strength of welded joints. The application of surface texturization technology in adhesive bonding and laser welding has shown great potential to improve bonding properties of heterogeneous materials. Future research should focus on developing new surface texturization techniques, optimizing existing process parameters, and exploring their application in more connection modes. In addition, an in-depth understanding of mechanism by which surface texturization affects microstructure and properties of welded joints will provide a theoretical basis for designing more efficient and reliable joint processes.